{"action":"Upgrade netty to 1:4.1.48-4 or later.","affected":[{"fixed":"1:4.1.48-4","introduced":"0"}],"component":"netty","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1:4.1.48-4"],"id":"tcs_01M5NFDN8504RECC49Q8G0Z22W","modified_at":"2026-10-09T09:47:34.510249385Z","published_at":"2021-03-30T15:15:14.573Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-21409","https://security-tracker.debian.org/tracker/CVE-2021-21409"],"severity":{"label":"medium","score":5.9},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-21409#Debian:14/netty","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-21409"}],"summary":"Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In Netty (io.netty:netty-codec-http2"}